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-rw-r--r--src/shared/install.c219
-rw-r--r--src/shared/install.h3
-rw-r--r--src/shared/machine-image.c26
3 files changed, 212 insertions, 36 deletions
diff --git a/src/shared/install.c b/src/shared/install.c
index 931d3e2907..cc36da1853 100644
--- a/src/shared/install.c
+++ b/src/shared/install.c
@@ -66,8 +66,56 @@ typedef struct {
OrderedHashmap *have_processed;
} InstallContext;
+typedef enum {
+ PRESET_UNKNOWN,
+ PRESET_ENABLE,
+ PRESET_DISABLE,
+} PresetAction;
+
+typedef struct {
+ char *pattern;
+ PresetAction action;
+} PresetRule;
+
+typedef struct {
+ PresetRule *rules;
+ size_t n_rules;
+} Presets;
+
+static inline void presets_freep(Presets *p) {
+ size_t i;
+
+ if (!p)
+ return;
+
+ for (i = 0; i < p->n_rules; i++)
+ free(p->rules[i].pattern);
+
+ free(p->rules);
+ p->n_rules = 0;
+}
+
static int unit_file_lookup_state(UnitFileScope scope, const LookupPaths *paths, const char *name, UnitFileState *ret);
+bool unit_type_may_alias(UnitType type) {
+ return IN_SET(type,
+ UNIT_SERVICE,
+ UNIT_SOCKET,
+ UNIT_TARGET,
+ UNIT_DEVICE,
+ UNIT_TIMER,
+ UNIT_PATH);
+}
+
+bool unit_type_may_template(UnitType type) {
+ return IN_SET(type,
+ UNIT_SERVICE,
+ UNIT_SOCKET,
+ UNIT_TARGET,
+ UNIT_TIMER,
+ UNIT_PATH);
+}
+
static int in_search_path(const LookupPaths *p, const char *path) {
_cleanup_free_ char *parent = NULL;
char **i;
@@ -898,6 +946,36 @@ fail:
return r;
}
+static int config_parse_alias(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ const char *name;
+ UnitType type;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ name = basename(filename);
+ type = unit_name_to_type(name);
+ if (!unit_type_may_alias(type))
+ return log_syntax(unit, LOG_WARNING, filename, line, 0,
+ "Aliases are not allowed for %s units, ignoring.",
+ unit_type_to_string(type));
+
+ return config_parse_strv(unit, filename, line, section, section_line,
+ lvalue, ltype, rvalue, data, userdata);
+}
+
static int config_parse_also(
const char *unit,
const char *filename,
@@ -954,6 +1032,7 @@ static int config_parse_default_instance(
void *userdata) {
UnitFileInstallInfo *i = data;
+ const char *name;
char *printed;
int r;
@@ -961,6 +1040,15 @@ static int config_parse_default_instance(
assert(lvalue);
assert(rvalue);
+ name = basename(filename);
+ if (unit_name_is_valid(name, UNIT_NAME_INSTANCE))
+ /* When enabling an instance, we might be using a template unit file,
+ * but we should ignore DefaultInstance silently. */
+ return 0;
+ if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE))
+ return log_syntax(unit, LOG_WARNING, filename, line, 0,
+ "DefaultInstance only makes sense for template units, ignoring.");
+
r = install_full_printf(i, rvalue, &printed);
if (r < 0)
return r;
@@ -983,7 +1071,7 @@ static int unit_file_load(
SearchFlags flags) {
const ConfigTableItem items[] = {
- { "Install", "Alias", config_parse_strv, 0, &info->aliases },
+ { "Install", "Alias", config_parse_alias, 0, &info->aliases },
{ "Install", "WantedBy", config_parse_strv, 0, &info->wanted_by },
{ "Install", "RequiredBy", config_parse_strv, 0, &info->required_by },
{ "Install", "DefaultInstance", config_parse_default_instance, 0, info },
@@ -991,6 +1079,8 @@ static int unit_file_load(
{}
};
+ const char *name;
+ UnitType type;
_cleanup_fclose_ FILE *f = NULL;
_cleanup_close_ int fd = -1;
struct stat st;
@@ -1000,6 +1090,12 @@ static int unit_file_load(
assert(info);
assert(path);
+ name = basename(path);
+ type = unit_name_to_type(name);
+ if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE|UNIT_NAME_INSTANCE) &&
+ !unit_type_may_template(type))
+ return log_error_errno(EINVAL, "Unit type %s cannot be templated.", unit_type_to_string(type));
+
if (!(flags & SEARCH_LOAD)) {
r = lstat(path, &st);
if (r < 0)
@@ -2367,17 +2463,16 @@ int unit_file_exists(UnitFileScope scope, const LookupPaths *paths, const char *
return 1;
}
-int unit_file_query_preset(UnitFileScope scope, const char *root_dir, const char *name) {
+static int read_presets(UnitFileScope scope, const char *root_dir, Presets *presets) {
+ _cleanup_(presets_freep) Presets ps = {};
+ size_t n_allocated = 0;
_cleanup_strv_free_ char **files = NULL;
char **p;
int r;
assert(scope >= 0);
assert(scope < _UNIT_FILE_SCOPE_MAX);
- assert(name);
-
- if (!unit_name_is_valid(name, UNIT_NAME_ANY))
- return -EINVAL;
+ assert(presets);
if (scope == UNIT_FILE_SYSTEM)
r = conf_files_list(&files, ".preset", root_dir,
@@ -2394,8 +2489,11 @@ int unit_file_query_preset(UnitFileScope scope, const char *root_dir, const char
"/usr/local/lib/systemd/user-preset",
"/usr/lib/systemd/user-preset",
NULL);
- else
- return 1; /* Default is "enable" */
+ else {
+ *presets = (Presets){};
+
+ return 0;
+ }
if (r < 0)
return r;
@@ -2403,6 +2501,7 @@ int unit_file_query_preset(UnitFileScope scope, const char *root_dir, const char
STRV_FOREACH(p, files) {
_cleanup_fclose_ FILE *f;
char line[LINE_MAX];
+ int n = 0;
f = fopen(*p, "re");
if (!f) {
@@ -2413,10 +2512,12 @@ int unit_file_query_preset(UnitFileScope scope, const char *root_dir, const char
}
FOREACH_LINE(line, f, return -errno) {
+ PresetRule rule = {};
const char *parameter;
char *l;
l = strstrip(line);
+ n++;
if (isempty(l))
continue;
@@ -2425,31 +2526,87 @@ int unit_file_query_preset(UnitFileScope scope, const char *root_dir, const char
parameter = first_word(l, "enable");
if (parameter) {
- if (fnmatch(parameter, name, FNM_NOESCAPE) == 0) {
- log_debug("Preset file says enable %s.", name);
- return 1;
- }
+ char *pattern;
- continue;
+ pattern = strdup(parameter);
+ if (!pattern)
+ return -ENOMEM;
+
+ rule = (PresetRule) {
+ .pattern = pattern,
+ .action = PRESET_ENABLE,
+ };
}
parameter = first_word(l, "disable");
if (parameter) {
- if (fnmatch(parameter, name, FNM_NOESCAPE) == 0) {
- log_debug("Preset file says disable %s.", name);
- return 0;
- }
+ char *pattern;
+
+ pattern = strdup(parameter);
+ if (!pattern)
+ return -ENOMEM;
+
+ rule = (PresetRule) {
+ .pattern = pattern,
+ .action = PRESET_DISABLE,
+ };
+ }
+ if (rule.action) {
+ if (!GREEDY_REALLOC(ps.rules, n_allocated, ps.n_rules + 1))
+ return -ENOMEM;
+
+ ps.rules[ps.n_rules++] = rule;
continue;
}
- log_debug("Couldn't parse line '%s'", l);
+ log_syntax(NULL, LOG_WARNING, *p, n, 0, "Couldn't parse line '%s'. Ignoring.", line);
}
}
- /* Default is "enable" */
- log_debug("Preset file doesn't say anything about %s, enabling.", name);
- return 1;
+ *presets = ps;
+ ps = (Presets){};
+
+ return 0;
+}
+
+static int query_presets(const char *name, const Presets presets) {
+ PresetAction action = PRESET_UNKNOWN;
+ size_t i;
+
+ if (!unit_name_is_valid(name, UNIT_NAME_ANY))
+ return -EINVAL;
+
+ for (i = 0; i < presets.n_rules; i++)
+ if (fnmatch(presets.rules[i].pattern, name, FNM_NOESCAPE) == 0) {
+ action = presets.rules[i].action;
+ break;
+ }
+
+ switch (action) {
+ case PRESET_UNKNOWN:
+ log_debug("Preset files don't specify rule for %s. Enabling.", name);
+ return 1;
+ case PRESET_ENABLE:
+ log_debug("Preset files say enable %s.", name);
+ return 1;
+ case PRESET_DISABLE:
+ log_debug("Preset files say disable %s.", name);
+ return 0;
+ default:
+ assert_not_reached("invalid preset action");
+ }
+}
+
+int unit_file_query_preset(UnitFileScope scope, const char *root_dir, const char *name) {
+ _cleanup_(presets_freep) Presets presets = {};
+ int r;
+
+ r = read_presets(scope, root_dir, &presets);
+ if (r < 0)
+ return r;
+
+ return query_presets(name, presets);
}
static int execute_preset(
@@ -2505,6 +2662,7 @@ static int preset_prepare_one(
LookupPaths *paths,
UnitFilePresetMode mode,
const char *name,
+ Presets presets,
UnitFileChange **changes,
unsigned *n_changes) {
@@ -2515,7 +2673,7 @@ static int preset_prepare_one(
install_info_find(minus, name))
return 0;
- r = unit_file_query_preset(scope, paths->root_dir, name);
+ r = query_presets(name, presets);
if (r < 0)
return r;
@@ -2545,6 +2703,7 @@ int unit_file_preset(
_cleanup_(install_context_done) InstallContext plus = {}, minus = {};
_cleanup_lookup_paths_free_ LookupPaths paths = {};
+ _cleanup_(presets_freep) Presets presets = {};
const char *config_path;
char **i;
int r;
@@ -2559,11 +2718,12 @@ int unit_file_preset(
config_path = runtime ? paths.runtime_config : paths.persistent_config;
- STRV_FOREACH(i, files) {
- if (!unit_name_is_valid(*i, UNIT_NAME_ANY))
- return -EINVAL;
+ r = read_presets(scope, root_dir, &presets);
+ if (r < 0)
+ return r;
- r = preset_prepare_one(scope, &plus, &minus, &paths, mode, *i, changes, n_changes);
+ STRV_FOREACH(i, files) {
+ r = preset_prepare_one(scope, &plus, &minus, &paths, mode, *i, presets, changes, n_changes);
if (r < 0)
return r;
}
@@ -2582,6 +2742,7 @@ int unit_file_preset_all(
_cleanup_(install_context_done) InstallContext plus = {}, minus = {};
_cleanup_lookup_paths_free_ LookupPaths paths = {};
+ _cleanup_(presets_freep) Presets presets = {};
const char *config_path = NULL;
char **i;
int r;
@@ -2596,6 +2757,10 @@ int unit_file_preset_all(
config_path = runtime ? paths.runtime_config : paths.persistent_config;
+ r = read_presets(scope, root_dir, &presets);
+ if (r < 0)
+ return r;
+
STRV_FOREACH(i, paths.search_path) {
_cleanup_closedir_ DIR *d = NULL;
struct dirent *de;
@@ -2619,7 +2784,7 @@ int unit_file_preset_all(
continue;
/* we don't pass changes[] in, because we want to handle errors on our own */
- r = preset_prepare_one(scope, &plus, &minus, &paths, mode, de->d_name, NULL, 0);
+ r = preset_prepare_one(scope, &plus, &minus, &paths, mode, de->d_name, presets, NULL, 0);
if (r == -ERFKILL)
r = unit_file_changes_add(changes, n_changes,
UNIT_FILE_IS_MASKED, de->d_name, NULL);
diff --git a/src/shared/install.h b/src/shared/install.h
index 4ffc5a21f2..5812447c5b 100644
--- a/src/shared/install.h
+++ b/src/shared/install.h
@@ -138,6 +138,9 @@ static inline bool UNIT_FILE_INSTALL_INFO_HAS_ALSO(UnitFileInstallInfo *i) {
return !strv_isempty(i->also);
}
+bool unit_type_may_alias(UnitType type) _const_;
+bool unit_type_may_template(UnitType type) _const_;
+
int unit_file_enable(
UnitFileScope scope,
bool runtime,
diff --git a/src/shared/machine-image.c b/src/shared/machine-image.c
index bebfc40efe..529d89ee2a 100644
--- a/src/shared/machine-image.c
+++ b/src/shared/machine-image.c
@@ -423,7 +423,7 @@ int image_remove(Image *i) {
case IMAGE_DIRECTORY:
/* Allow deletion of read-only directories */
- (void) chattr_path(i->path, false, FS_IMMUTABLE_FL);
+ (void) chattr_path(i->path, 0, FS_IMMUTABLE_FL);
r = rm_rf(i->path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
if (r < 0)
return r;
@@ -487,7 +487,7 @@ int image_rename(Image *i, const char *new_name) {
/* Make sure nobody takes the new name, between the time we
* checked it is currently unused in all search paths, and the
- * time we take possesion of it */
+ * time we take possession of it */
r = image_name_lock(new_name, LOCK_EX|LOCK_NB, &name_lock);
if (r < 0)
return r;
@@ -505,7 +505,7 @@ int image_rename(Image *i, const char *new_name) {
(void) read_attr_path(i->path, &file_attr);
if (file_attr & FS_IMMUTABLE_FL)
- (void) chattr_path(i->path, false, FS_IMMUTABLE_FL);
+ (void) chattr_path(i->path, 0, FS_IMMUTABLE_FL);
/* fall through */
@@ -538,7 +538,7 @@ int image_rename(Image *i, const char *new_name) {
/* Restore the immutable bit, if it was set before */
if (file_attr & FS_IMMUTABLE_FL)
- (void) chattr_path(new_path, true, FS_IMMUTABLE_FL);
+ (void) chattr_path(new_path, FS_IMMUTABLE_FL, FS_IMMUTABLE_FL);
free(i->path);
i->path = new_path;
@@ -588,7 +588,7 @@ int image_clone(Image *i, const char *new_name, bool read_only) {
/* Make sure nobody takes the new name, between the time we
* checked it is currently unused in all search paths, and the
- * time we take possesion of it */
+ * time we take possession of it */
r = image_name_lock(new_name, LOCK_EX|LOCK_NB, &name_lock);
if (r < 0)
return r;
@@ -603,13 +603,21 @@ int image_clone(Image *i, const char *new_name, bool read_only) {
case IMAGE_SUBVOLUME:
case IMAGE_DIRECTORY:
+ /* If we can we'll always try to create a new btrfs subvolume here, even if the source is a plain
+ * directory.*/
+
new_path = strjoina("/var/lib/machines/", new_name);
r = btrfs_subvol_snapshot(i->path, new_path, (read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | BTRFS_SNAPSHOT_FALLBACK_COPY | BTRFS_SNAPSHOT_RECURSIVE | BTRFS_SNAPSHOT_QUOTA);
+ if (r == -EOPNOTSUPP) {
+ /* No btrfs snapshots supported, create a normal directory then. */
- /* Enable "subtree" quotas for the copy, if we didn't
- * copy any quota from the source. */
- (void) btrfs_subvol_auto_qgroup(i->path, 0, true);
+ r = copy_directory(i->path, new_path, false);
+ if (r >= 0)
+ (void) chattr_path(new_path, read_only ? FS_IMMUTABLE_FL : 0, FS_IMMUTABLE_FL);
+ } else if (r >= 0)
+ /* Enable "subtree" quotas for the copy, if we didn't copy any quota from the source. */
+ (void) btrfs_subvol_auto_qgroup(new_path, 0, true);
break;
@@ -670,7 +678,7 @@ int image_read_only(Image *i, bool b) {
a read-only subvolume, but at least something, and
we can read the value back.*/
- r = chattr_path(i->path, b, FS_IMMUTABLE_FL);
+ r = chattr_path(i->path, b ? FS_IMMUTABLE_FL : 0, FS_IMMUTABLE_FL);
if (r < 0)
return r;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-08 19:37:32 +0000